Results for “latest row”
Small, practical examples. Search by task or narrow things down below.
Undo a multi-row transfer atomically
SQL Server: The first transaction commits the fixtures. Rolling back the second transaction restores both sides of the attempted transfer.
SQL Server✓ Tested
Undo a multi-row transfer atomically
Postgres: The first transaction commits the fixtures. Rolling back the second transaction restores both sides of the attempted transfer.
Postgres✓ Tested
Undo a multi-row transfer atomically
SQLite: The first transaction commits the fixtures. Rolling back the second transaction restores both sides of the attempted transfer.
SQLite✓ Tested
Update a row on conflict
Use a primary key to insert or update one value.
upsert✓ Tested
Update one matching row
Change a value with an explicit filter.
UPDATE✓ Tested
Update one row using its primary key
SQL: Use a precise WHERE condition to change only the intended row in a scratch table.
SQL✓ Tested
Update one row using its primary key
SQL Server: Use a precise WHERE condition to change only the intended row in a scratch table.
SQL Server✓ Tested
Update one row using its primary key
Postgres: Use a precise WHERE condition to change only the intended row in a scratch table.
Postgres✓ Tested
Update one row using its primary key
SQLite: Use a precise WHERE condition to change only the intended row in a scratch table.
SQLite✓ Tested
Update rows selected by a related table
SQL: Use EXISTS to limit updates based on an independent eligibility table.
SQL✓ Tested
Update rows selected by a related table
SQL Server: Use EXISTS to limit updates based on an independent eligibility table.
SQL Server✓ Tested
Update rows selected by a related table
Postgres: Use EXISTS to limit updates based on an independent eligibility table.
Postgres✓ Tested